Furnace



March 11 1924.

11,486,462 L./SHACKELFORD FURNACE Filed 001;. 17. 1921 3 Sheets-Sheet l Q) gwventoz March 11 1924.

11,486,462 L. S'HACKELFORD FURNACE Filed Oct. 17. 1921 s sheets-sheet 2 Patented Mar. 11, 1924.

UNHTED fiT'TEd FURNACE.

Application filed October 17, 1921.

To all whom it may concern:

Be it known that I, LINCOLN SHACKEL- FORD, a citizen of theUnited States, residing at Bonaparte, in the county of Van Buren and State of Iowa, have invented a new and useful Furnace, of which the following is a specification.

This invention aims to provide a simple means whereby combustible elements carried in suspension by smoke 0r products of combustion, may be made available for heating a boiler, or for any other purpose. 1 It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

I do not bind myself to the specific details depicted and described, since, within the scope of what is claimed, a mechanic may make changes in the form selected as one of the many possible material embodiments of the invention, without departing from the spirit of the invention or placing the utility thereof in jeopardy.

In the accompanying drawings :-Figure 1 shows in vertical longitudinal section, a device constructed in accordance with the invention; Figure 2 is a cross section on the line 22 of Figure 1; Figure 3 is a cross section on the line 33 of Figure 1; Figure 41 is a cross section taken horizontally and disclosing the burner construction.

In carrying out the invention there is provided a furnace including a bottom 1, sides 2, a front 3 and a back 4. A balfle 5 extends between the sides 2 and is located to the rear of the front 3, the baiiie forming the back wall of a fire pot 6 including a grate 7 access being had to the fire pot by way of a stoke door 8 in the front 3, and access being had to the ash pit 10through a clean-out door 9 carried by the front. To the rear of the baflie 5, a forward cross wall 11 extends between the sides 2. A rear wall 12 extends between the sides 2 and is dis posed to the rear of the forward cross wall 11. The space defined by the walls 11 and 12 and the intervening portions of the sides 2 defines an intermediate chamber 32. A platform 14: connects the rear cross wall 12 with the back 4:, a lower chamber 15 existing below the platform, and an upper chamber 16 existing thereabove.

A first flue 17 is mounted at its ends in the cross walls 11 and 12 and extends through the intermediate chamber 32, the

Serial No. 503,211.

flue establishing communication between the space 18 which exists between the battle 5 and the wall 11 on the one hand, and the lower chamber 15 on the other hand. The numeral 19 marks a second flue having its forward end mounted in cross wall 12, the rear end of the flue being disposed adjacent to the back 1. The flues 17 and 19 are disposed relatively near to the bottom 1. The fine 17 is provided with a damper 20, controlled by any suitable operating'means 21.

Burners are disposed in the intermediate chamber 32. Each burner embodies a bridge 22 having its ends mounted in the sides 2, the bridges being provided at their outer edges with longitudinal upstanding wings 23. The bridges 22 have longitudinal ribs 241 provided with inclined surfaces 25 overhanging the wings 23. Combustion slits 26 exist between the bridges 22 and between the upstanding wings 23 thereof. Each rib 2 1 has a longitudinal passage 27 communicating with air inlet ports 28 in the sides 2. Each bridge has, further, transverse apertures 29, communicating at their inner ends with the passage 27, and discharging at their outer ends on inclined surfaces 30 formed on the wings 23. The air inlets 28 are under the control of dampers 31 of any desired sort, the dampers be ing mounted to reciprocate, if desired, in guides 50 on the sides 2, and being provided with racks 33, coacting with pinions 34; on shafts 35 journaled in bearings 36 on the sides 2.

A boiler 37 is mounted on the front 3 and the forward cross wall 11, there being a space 38 between the upper edge of the battle 5 and the boiler, a space 39 existing between the upper edge of the rear cross wall 12 and the boiler. An arch 40 may bridge the space between the rear end of the boiler 37 and the back 4. The outlet for the products of combustion traversing the boiler is shown at 11.

In practical operation, the coal or other fuel is burned in the fire pot 6. The products of combustion pass rearwardly through the opening 38, downwardly through the space existing between the baffle 5 and the wall 11, and longitudinally of the flue 17 under the control of the damper 20. Thence, the products of combustion enter the lower chamber 15 and circulate therein, the products passing by way of the flue 19, into the intermediate chamber, below the burners.

Thence, the productspassupwardly through the slits 26. Air, under the control of the dampers 31, enters the inlets 28 in the walls 2 and asses into the passage 27 of the ribs 24 on t e bridges 22, the air moving, longitudinally of the structure, through the aper tures 29 and being directed upwardly by the inclined surfaces 30 of the wings 23, and by thawings 23 the air mingling with the pijoducts of combustion traversing the slits 26:, the mixture bein directed inwardly the overhanging inclined? surfaces 25 of the ribs, thdmixture burning between the ribs, .or closely adj acentthereto. The resulting prodnets; of combustion move rearwardly through the opening 39, into the upper chamber 16,.through the boiler and out .of the outlet 41.. The construction of the deviceis such that all combustible matter will be burned, with a corresponding saving in heat to the boiler.

Whateis claimedis:-

.1. In a device of the class described, a boiler setting comprising a front and a baflle formingpartof a fire pot; a forward cross wall disposed to therear of the bafile andspaced therefrom, the fire pot communicatingwith the space between the baffle and vfuel, and withvthe application of increased .thecross wall, across the upper edge of the b'aflie;a rear cross wall spaced fromthe forward cross-wall and defining an intermediate chamber therewith; a back, spaced wan and, extended into ,the ,upper chamber,

the ,burners being disposed beneath the boiler.

the lower chamber; and means for conducting the products of combustion from the lower chamber into the intermediate chamber, beneath the bridges.

3. A device of the class described, embodying a fire pot; a lower chamber; an intermediate chamber between the fire pot and the lower chamber; a burner in the inter mediate chamber; means for admitting air to the burner means for conducting the productsojf combustion from the fire pot through the intermediate chamber into the lower chamber; and means for conducting the products of combustion from the lower chamber into the intermediate chamber beneath theburner.

4. In a device of the class described, a fire pot, a lower chamber, and an interme diate chamber therebetween; bridges in the intermediate chamber and having upstanding wings, the bridges having upstanding ribs locatedbetween the wings and provided with longitudinal air passages, the ribs hav ing transverseapertures discharging between thewings, the bridges being spaced to define slits between the wings; means for conducting the products of combustion from the fire pot, through the intermediate chamber into the lower chamber; and means for conducting theproducts of combustion from the lower chamber into the intermediate chamber beneath the bridges. I c In testimony that I claim the foregoing as my own, I have hereto ailixed my signature in the presence of two witnesses.

LINCOLN SHACKELFORD. Witnesses:

N. H. Fox, V P. F. CAMPBELL. 

